package cn.tedu;

import java.sql.*;

public class Demo03 {
    public static void main(String[] args) throws SQLException {
        Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/empdb?characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false","root","root");
        Statement s = conn.createStatement();
        //执行插入数据SQL
        s.executeUpdate("insert into emp(name) values('tom')");
        //执行修改数据SQL
        s.executeUpdate("update emp set name='jerry' where name='tom'");
        //执行删除数据SQL
        s.executeUpdate("delete from emp where name='jerry'");
        //执行查询的SQL
        ResultSet rs=s.executeQuery("select name,sal from emp");
        //遍历结果集中的数据
        while(rs.next()){
            //获取游标指向的这条数据的某个字段的值,通过字段名获取
            /*String name = rs.getString("name");
            double sal = rs.getDouble("sal");*/
            //通过查询回来的数据的位置获取数据
            String name= rs.getString(1);
            double sal = rs.getDouble(2);
            System.out.println(name+","+sal);
        }
        System.out.println("执行完毕!");
        conn.close();
    }
}
